Abstract: Copper slag is a vitally secondary resource, more quantities, richen in valuable metal elements, which has an important utility in industries. Recently, the main utilization direction of copper slag is to extract valuable metal elements and reduce the application. It can be seen that through the review of the characteristics, sources and previous studies of copper slag, there are some deficiencies in the treatment of copper slag via flotation method, fire method, wet method, combined method or bioleaching method, and the same as in the application of reduction. Ultimately, the research and application direction of copper slag in the future are pointed out, so that the copper slag can be applied reasonably and comprehensively.